package com.sky.aspect;

import com.sky.annotation.AutoFill;
import com.sky.context.BaseContext;
import com.sky.enumeration.OperationType;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.Signature;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.stereotype.Component;

import java.lang.reflect.Method;
import java.time.LocalDateTime;

@Aspect
@Component
@Slf4j
public class AutoFillAspect {

    @Pointcut("execution(* com.sky.mapper.*.*(..))  &&  @annotation(com.sky.annotation.AutoFill)")
    public void autoFillPointCut(){}

    @Before("autoFillPointCut()")
    public void autoFill(JoinPoint joinPoint){
        log.info("开始进行数据填充");


        //获取数据库的操作类型
        MethodSignature signature = (MethodSignature) joinPoint.getSignature();
        AutoFill  autoFill = signature.getMethod().getAnnotation(AutoFill.class);
        OperationType operationType = autoFill.value();


        //获取参数---实体对象
        Object[] args = joinPoint.getArgs();
        if(args == null || args.length == 0){
            return;
        }
        Object entity = args[0];


        //准备赋值的数据
        LocalDateTime now = LocalDateTime.now();
        Long  currentId= BaseContext.getCurrentId();

        if(operationType == OperationType.INSERT){
            try {
                Method setUpdateTime = entity.getClass().getDeclaredMethod("setUpdateTime", LocalDateTime.class);
                Method setCreateTime = entity.getClass().getDeclaredMethod("setCreateTime", LocalDateTime.class);
                Method setUpdateUser = entity.getClass().getDeclaredMethod("setUpdateUser", Long.class);
                Method setCreateUser = entity.getClass().getDeclaredMethod("setCreateUser", Long.class);
                setUpdateTime.invoke(entity,now);
                setCreateTime.invoke(entity,now);
                setUpdateUser.invoke(entity,currentId);
                setCreateUser.invoke(entity,currentId);
            } catch (Exception e) {
                throw new RuntimeException(e);
            }


        } else if ( operationType == OperationType.UPDATE) {

            try {
                Method setUpdateTime = entity.getClass().getDeclaredMethod("setUpdateTime", LocalDateTime.class);
                Method setUpdateUser = entity.getClass().getDeclaredMethod("setUpdateUser", Long.class);

                setUpdateTime.invoke(entity,now);

                setUpdateUser.invoke(entity,currentId);

            } catch (Exception e) {
                throw new RuntimeException(e);
            }


        }

    }
}
